You may notice nasal discharge or mucus that's thick and yellow or green. This discharge can often cause a stuffy nose. It's ...

Treatment may depend on the cause. A sinus infection, also known as sinusitis or rhinosinusitis, occurs when your nasal cavities become swollen and inflamed. Fluid buildup in the sinuses can allow ...

Sinusitis is classified as acute or chronic based on the duration of the infection ... with sinus aspiration or open antrostomy, frequently do not correlate, unless gross purulent discharge ...